Avesta – The Original Sacred Book of Zoroastrianism
The Avesta (also Zenda Avesta) is the original sacred book of Zoroastrianism. Supposedly written by Zarathushtra himself, the original Avesta was destoryed by Alexander the Great. The current book contains fragments of the original text and was put back together around the thirteenth century.
The book was written in old Iranian, and contains four main parts. The Yansa – the oldest component contains mostly songs, the Vispred, the Yashts (hymns of praise) and the Videvdat – a collection of purification rituals.